System and method for verification of cache snoop logic and...

Details System and method for verification of cache snoop logic and... System and method for verification of cache snoop logic and...

2007-07-18

2010-02-09

Bonzo, Bryce P (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S050000

Reexamination Certificate

active

07661023

ABSTRACT:
A system and method for verifying cache snoop logic and coherency between instruction cache and data cache using instruction stream “holes” that are created by branch instructions is presented. A test pattern generator includes instructions that load/store data into instruction stream holes. In turn, by executing the test pattern, a processor thread loads an L2 cache line into both instruction cache (icache) and data cache (dcache). The test pattern modifies the data in the dcache in response to a store instruction. In turn, the invention described herein identifies whether snoop logic detects the change and updates the icache's corresponding cache line accordingly.

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